| Countries of Europe Quiz | 0 | - | 5.00 | 3,794,180 |
| Countries of South America | 0 | - | 5.00 | 930,427 |
| Countries of Oceania | 0 | - | 5.00 | 1,060,821 |
| Countries of Asia Quiz | 0 | - | 5.00 | 1,884,437 |
| Landlocked Countries | 0 | - | 4.99 | 424,146 |
| Countries of the World Quiz | 0 | - | 5.00 | 47,757,033 |
| Sahara Desert Countries | 0 | - | 4.98 | 165,477 |
| Himalayan Countries | 0 | - | 4.94 | 139,645 |
| Andean Countries | 0 | - | 4.94 | 85,118 |
| Countries with the Youngest Median Age | 0 | - | 4.97 | 64,308 |
| Countries in the Southern Hemisphere | 0 | - | 4.99 | 126,541 |
| Coffee Producing Countries | 0 | - | 4.83 | 67,874 |
| Countries with Shrinking Populations | 0 | - | 4.94 | 66,161 |
| Danube Countries | 0 | - | 4.97 | 72,242 |
| Countries With an "Ish" Demonym | 0 | - | 4.97 | 117,372 |
| Countries With an "Ese" Demonym | 0 | - | 4.97 | 86,665 |
| Countries with the Worst Passports | 0 | - | 4.93 | 84,785 |
| Countries with the Most Immigrants | 0 | - | 4.90 | 150,271 |
| European Landlocked Countries | 0 | - | 4.99 | 147,417 |
| Partially Recognized Countries | 0 | - | 4.98 | 107,025 |
| Countries with the Most Species | 0 | - | 4.99 | 103,448 |
| Countries 197 to 205 | 0 | - | 4.90 | 71,164 |
| Tropic of Cancer Countries | 0 | - | 4.97 | 53,695 |
| Tropic of Capricorn Countries | 0 | - | 4.96 | 47,805 |
| Countries that Use the Peso | 0 | - | 4.89 | 59,722 |
| Countries with the Largest Exclusive Economic Zone | 0 | - | 4.90 | 73,450 |
| Countries with a AAA Credit Rating | 0 | - | 4.86 | 57,870 |
| Countries in the Alps | 0 | - | 4.87 | 118,528 |
| Top Five Importing Partners by Country | 0 | - | 4.97 | 102,190 |
| Countries, Capitals, Currencies and Official Languages | 0 | - | 5.00 | 107,519 |
| Biggest Import Partners By Country | 0 | - | 4.99 | 78,834 |
| Southernmost Countries by Continent | 0 | - | 4.98 | 96,843 |
| Northernmost Countries by Continent | 0 | - | 4.98 | 116,772 |
| Countries by Population Growth, 1970–Present | 0 | - | 4.92 | 96,115 |
| Five Biggest Countries by Latitude | 0 | - | 4.97 | 100,958 |
| Five Biggest Countries by Longitude | 0 | - | 4.91 | 53,699 |
| Largest Country by Body of Water | 0 | - | 4.96 | 58,321 |
| Countries with the Most Container Port Traffic | 0 | - | 4.92 | 63,036 |
| Bridge and Tunnel Borders | 0 | - | 4.96 | 53,777 |
| Countries with the Longest Road Networks Quiz | 0 | - | 4.90 | 41,642 |
| Countries that Touch the Prime Meridian or Equator | 0 | - | 4.88 | 104,413 |
| Arctic Ocean Countries | 0 | - | 4.95 | 79,654 |
| Countries with the Most Grassland | 0 | - | 4.94 | 77,745 |
| All Countries by Area : Four at a Time | 0 | - | 5.00 | 119,434 |
| Countries with the Most Climate Zones | 0 | - | 4.96 | 68,492 |
| Countries that Host the Most Refugees | 0 | - | 4.96 | 65,407 |
| Countries of the World by Similar Area in 90 Seconds | 0 | - | 4.95 | 46,441 |
| All Countries of the World by Area with Hints | 0 | - | 4.97 | 245,059 |
| World Countries - Blind Typing | 0 | - | 5.00 | 108,747 |
| Countries in Their Own Alphabet | 0 | - | 4.95 | 48,406 |
| Largest Countries By Category | 0 | - | 4.97 | 158,590 |
| Countries by Countries | 0 | - | 4.96 | 63,469 |
| Country Flags with the Most White | 0 | - | 4.85 | 139,045 |
| Countries With the Northernmost Southernmost Point | 0 | - | 4.96 | 62,356 |
| Countries with the Southernmost Northernmost Point | 0 | - | 4.87 | 47,633 |
| Country Flags With Only Two Colors | 0 | - | 4.91 | 88,941 |
| Top 50 Countries by Population - In Order | 0 | - | 4.98 | 333,625 |
| Spanish-Speaking Countries | 0 | - | 4.95 | 376,201 |
| Countries with the Most Tourists Quiz | 0 | - | 4.92 | 408,730 |
| Island Countries | 0 | - | 4.99 | 711,920 |
| Biggest Countries by Area | 0 | - | 5.00 | 1,052,883 |
| Northernmost Countries | 0 | - | 4.99 | 363,257 |
| Countries of North America Quiz | 0 | - | 5.00 | 1,029,031 |
| "Land" Countries | 0 | - | 4.98 | 337,973 |
| Countries of the World with an Empty Map | 0 | - | 5.00 | 3,389,774 |
| Countries More Populous Than Their Neighbors | 0 | - | 4.99 | 174,617 |
| Countries with Megacities | 0 | - | 4.99 | 266,117 |
| Countries With More than 50 Million People | 0 | - | 4.99 | 200,364 |
| Countries with the Most Population Growth by Decade | 0 | - | 4.98 | 113,815 |
| Countries With More than 200 Million People | 0 | - | 4.95 | 138,647 |
| Countries Less Populous Than Their Neighbors | 0 | - | 4.96 | 81,940 |
| Countries by Official Language | 0 | - | 4.95 | 195,714 |
| Countries with the Most Speakers of These Languages | 0 | - | 4.91 | 297,218 |
| Countries in their Native Language | 0 | - | 4.99 | 199,485 |
| Independence from Whom | 0 | - | 4.99 | 212,672 |
| Subdivisions by Country | 0 | - | 4.87 | 50,548 |
| Who Controlled These Colonies? | 0 | - | 4.88 | 133,160 |
| Megadiverse Countries | 0 | - | 4.96 | 135,168 |
| Countries With the Most English Speakers | 0 | - | 4.86 | 132,608 |
| Countries Producing the Most Sugarcane | 0 | - | 4.94 | 55,468 |
| Countries with Multiple Big Islands | 0 | - | 4.92 | 126,365 |
| Top 10 Wheat-Producing Countries | 0 | - | 4.89 | 75,171 |
| 15 Biggest Island Countries | 0 | - | 4.98 | 163,403 |
| Most Recently-Settled Countries | 0 | - | 4.94 | 62,725 |
| Countries of the World in 1938 Quiz | 0 | - | 4.95 | 94,835 |
| Countries Bigger Than Their Neighbors | 0 | - | 4.93 | 154,483 |
| Countries with Multiple Populous Islands | 0 | - | 4.89 | 95,763 |
| Countries in Relation to Cities #1 | 0 | - | 4.92 | 45,215 |
| Countries by Sports League Revenue | 0 | - | 4.95 | 78,137 |
| Landmarks of Countries #1 | 0 | - | 4.88 | 108,285 |
| Countries Furthest from the United States | 0 | - | 4.94 | 89,352 |
| Countries with the Highest HDI | 0 | - | 4.95 | 137,073 |
| Straight Shot to the Arctic Circle | 0 | - | 4.88 | 75,494 |
| Most Dispersed Island Nations | 0 | - | 4.97 | 71,613 |
| Countries of the World in Alphabetical Order | 0 | - | 5.00 | 111,930 |
| World Map Quiz | 0 | - | 4.81 | 65,409 |
| Recognized, Non-Recognized Countries, and Territories of the World | 0 | - | 5.00 | 158,442 |
| Smallest Countries with at Least One Border | 0 | - | 4.87 | 107,550 |
| Countries by Founding Story | 0 | - | 4.95 | 77,627 |
| Countries by Road Signs | 0 | - | 4.98 | 54,231 |
| Southernmost Countries of the World | 0 | - | 4.99 | 228,914 |
| Countries by Inland Surface Water | 0 | - | 4.93 | 105,833 |
| Top 20 Motor Vehicle Producing Countries | 0 | - | 4.91 | 123,397 |
| Countries With the Most Languages | 0 | - | 4.90 | 203,120 |
| Countries with the Highest Population Under Age 15 | 0 | - | 4.96 | 111,242 |
| Countries with the Highest Population 65 and Older | 0 | - | 4.90 | 94,377 |
| Countries with the Most Prisoners | 0 | - | 4.94 | 99,572 |
| Countries with the Most Domestic Camels | 0 | - | 4.94 | 61,607 |
| Tallest Countries North to South | 0 | - | 4.86 | 129,743 |
| Widest Countries East to West | 0 | - | 4.92 | 130,272 |
| Countries with the Highest Average Elevation | 0 | - | 4.98 | 71,549 |
| Largest Countries by Area or Population | 0 | - | 5.00 | 187,063 |
| Countries with the Most Area in the Southern Hemisphere | 0 | - | 4.99 | 98,452 |
| Most Populous Countries as a Percent of Their Continent | 0 | - | 4.97 | 94,959 |
| Largest Countries as a Percent of Continent | 0 | - | 4.97 | 148,832 |
| Countries with the Most Desert | 0 | - | 4.93 | 128,328 |
| Countries by Contribution to UN Budget | 0 | - | 4.87 | 77,456 |
| Countries with Most Nobel Laureates per Capita | 0 | - | 4.83 | 34,859 |
| Countries with Double Letters | 0 | - | 4.96 | 96,747 |
| Countries that End in N | 0 | - | 4.95 | 171,634 |
| Countries with Five Letters | 0 | - | 4.96 | 283,309 |
| Countries with Six Letters | 0 | - | 4.94 | 214,082 |
| Countries with W | 0 | - | 4.96 | 160,702 |
| Countries with Z | 0 | - | 4.98 | 292,052 |
| Countries with Letters Missing | 0 | - | 4.96 | 187,057 |
| Countries That End in U | 0 | - | 4.95 | 121,055 |
| Top 20 Longest One-Word Country Names | 0 | - | 4.97 | 134,850 |
| Countries that End in O | 0 | - | 4.92 | 159,702 |
| Countries that End in R | 0 | - | 4.87 | 119,096 |
| Country Names Created by Only 4 Letters | 0 | - | 4.99 | 155,847 |
| Countries Ending in "IA" | 0 | - | 4.99 | 209,534 |
| Countries by First and Last Letter #1 | 0 | - | 4.97 | 170,973 |
| Countries by Last Two Letters | 0 | - | 4.85 | 135,686 |
| Countries by First and Last Letter #2 | 0 | - | 4.96 | 142,608 |
| Countries That End in Y | 0 | - | 4.91 | 186,014 |
| Countries Based on First Two Letters #1 | 0 | - | 4.99 | 198,238 |
| Countries with Cardinal Directions in Their Names | 0 | - | 4.92 | 153,107 |
| Countries that End in I | 0 | - | 4.94 | 135,232 |
| Countries Based on First Two Letters #2 | 0 | - | 4.99 | 184,427 |
| Countries by Initial Letter and Length #1 | 0 | - | 4.98 | 95,955 |
| Countries That End in NIA | 0 | - | 4.92 | 109,944 |
| Countries That End in BIA | 0 | - | 4.93 | 149,427 |
| Countries by Initial Letter and Continent #1 | 0 | - | 4.94 | 167,369 |
| Countries Whose Names Start with Saint | 0 | - | 4.87 | 119,647 |
| Countries That End in RIA | 0 | - | 4.93 | 126,961 |
| Most Common Words in Official Country Names | 0 | - | 4.86 | 111,247 |
| Divided Country Name Puzzle #1 | 0 | - | 4.99 | 228,183 |
| Divided Country Name Puzzle #2 | 0 | - | 4.99 | 133,991 |
| Divided Country Name Puzzle #3 | 0 | - | 4.92 | 126,427 |
| Groups of Countries that Start with the Same 3 Letters | 0 | - | 5.00 | 91,980 |
| Add A Letter - Make a Country | 0 | - | 4.81 | 74,716 |
| Countries With One Word and Three A's | 0 | - | 4.92 | 53,215 |
| Countries with a Unique Last Letter | 0 | - | 4.90 | 103,503 |
| Unique Starting Letter - Countries by Continent | 0 | - | 4.98 | 125,750 |
| Countries that are Free from U.S.A. | 0 | - | 4.89 | 49,563 |
| Countries with the Word "And" | 0 | - | 4.99 | 117,545 |
| Countries Containing Two or More Words | 0 | - | 4.96 | 54,246 |
| Countries that End in L | 0 | - | 4.94 | 157,012 |
| "Stan" Countries Quiz | 0 | - | 4.97 | 216,862 |
| Countries Ending with "An", but not "Stan" | 0 | - | 4.98 | 85,313 |
| City to Country Quiz #1 | 0 | - | 4.97 | 156,167 |
| City to Country Quiz #3 | 0 | - | 4.88 | 119,107 |
| 45 European Countries, 45 Cities | 0 | - | 4.95 | 79,150 |
| Five Biggest Countries by Continent | 0 | - | 4.99 | 250,167 |
| Five Poorest Countries by Continent | 0 | - | 4.93 | 200,960 |
| Five Least Populated Countries by Continent | 0 | - | 4.95 | 143,323 |
| Five Smallest Countries by Continent | 0 | - | 4.98 | 164,091 |
| First Five Countries Alphabetically by Continent | 0 | - | 4.94 | 225,778 |
| Last Five Countries Alphabetically by Continent | 0 | - | 4.98 | 153,081 |
| Five Northernmost Capital Cities by Continent | 0 | - | 4.89 | 71,184 |
| Top 10 Countries in Nuclear Power Production | 0 | - | 4.95 | 86,768 |
| 10 Northernmost Countries That Start with S | 0 | - | 4.94 | 63,144 |
| Biggest Countries by Population | 0 | - | 5.00 | 1,451,760 |
| Smallest Countries by Population and Area | 0 | - | 4.99 | 381,869 |
| One Border Countries | 0 | - | 4.98 | 471,143 |
| Countries by Borders in 90 Seconds | 0 | - | 4.99 | 3,843,186 |
| Countries by First Two Letters in 90 Seconds | 0 | - | 4.98 | 5,645,035 |
| Five Most Densely Populated Countries by Continent | 0 | - | 4.96 | 87,157 |
| Five Most Populated Countries by Continent | 0 | - | 4.99 | 268,683 |
| Most Populous Countries with Exceptions | 0 | - | 4.98 | 122,483 |
| Top 10 Most Densely-Populated Countries in Europe | 0 | - | 4.98 | 112,763 |
| Five Least Densely Populated Countries by Continent | 0 | - | 4.90 | 94,033 |
| Countries by Population Range - Tile Select | 0 | - | 4.87 | 59,444 |
| Countries by National Anthem | 0 | - | 4.92 | 71,367 |
| NATO Countries | 0 | - | 4.98 | 282,653 |
| EU Countries Quiz | 0 | - | 4.99 | 276,943 |
| Recently Independent Countries | 0 | - | 4.98 | 159,755 |
| French-Speaking Countries | 0 | - | 4.85 | 271,377 |
| Natural Features of Countries #1 | 0 | - | 4.87 | 83,989 |
| Countries That Use the Euro | 0 | - | 4.95 | 106,298 |
| Countries with the Most Military Troops | 0 | - | 4.95 | 290,443 |
| Countries with Nuclear Weapons | 0 | - | 4.86 | 275,873 |
| German-Speaking Countries | 0 | - | 4.92 | 145,923 |
| Countries with Wild Tigers | 0 | - | 4.96 | 137,139 |
| Countries with Wild Penguins | 0 | - | 4.94 | 100,433 |
| Solve the Secret Country #1 | 0 | - | 4.94 | 167,388 |
| Top Five Countries by Religion | 0 | - | 4.93 | 172,893 |
| Solve the Secret Country #2 | 0 | - | 4.87 | 119,779 |
| Countries by Hottest Recorded Temperature | 0 | - | 4.92 | 113,639 |
| Countries by Coldest Recorded Temperature | 0 | - | 4.83 | 112,890 |
